Release Data Tools 0.2.0

2026-09-02 12:50:51 +02:00
parent e773a2ffe8
commit a8eb8e53b3
36 changed files with 2168 additions and 235 deletions
@@ -0,0 +1,39 @@
 name: Verify
 on:
  push:
    branches: [main]
  pull_request:
  workflow_dispatch:
 concurrency:
  group: verify-${{ gitea.repository }}-${{ gitea.ref }}
  cancel-in-progress: true
 permissions:
  contents: read
 jobs:
  verify:
    runs-on: ubuntu-latest
    timeout-minutes: 45
    env:
      CI: "true"
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: "22"
          cache: npm
      - name: Select declared npm version
        run: npm install --global npm@11.17.0
      - name: Install dependencies
        run: npm ci
      - name: Audit runtime dependencies
        run: npm audit --omit=dev --audit-level=moderate
      - name: Check, test, and build
        run: npm run check
      - name: Install browser engines
        run: npx playwright install --with-deps chromium firefox webkit
      - name: Browser tests
        run: npm run test:browser
@@ -1,5 +1,19 @@
 # Changelog
 ## 0.2.0 - 2026-09-02
 - Adopted `@add-ideas/toolbox-helpers` 0.2.0 for deterministic byte-size
  display, safe downloads and the cancellable worker-job/progress/deadline
  protocol.
 - Kept domain-specific structured-data parsing and diagnostics inside Data
  Tools while removing its duplicate worker lifecycle implementation.
 - Added explicit modular import/export adapter registries for every supported
  structured-data format.
 - Added bounded sample-based JSON Schema inference with field presence,
  nullability and exact numeric-representation evidence.
 - Added immutable RFC 6901 structural edits with a reviewed source-format
  preview and mandatory acknowledgement of known serialization loss.
 ## 0.1.0 - 2026-09-01
 - Added exact-number JSON, YAML 1.2, TOML, hardened XML, CSV, TSV and NDJSON parsing.
@@ -2,15 +2,20 @@
 Inspect, format, query, flatten and convert structured data locally in the browser. Data Tools is a standalone application in the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal); input text and files never leave the current browser.
-## Version 0.1.0
+## Version 0.2.0
 - Detect or explicitly select JSON, YAML 1.2, TOML, XML, CSV, TSV and NDJSON.
 - Keep JSON integer and decimal lexemes exact, including values beyond IEEE-754 range.
 - Inspect a bounded typed tree, a tabular projection and flattened scalar leaves.
 - Query with RFC 6901 JSON Pointer or a deliberately small, non-evaluating path subset.
 - Infer a bounded, sample-labelled JSON Schema with field presence, nullability, mixed types and exact-number provenance.
 - Preview immutable RFC 6901 add/replace/remove edits, inspect the source-format serialization disclosure, and explicitly accept any loss before applying it.
 - Format and convert between every supported output with a visible loss/coercion report.
 - Drive import, export and format selectors from one ordered adapter catalogue with a concrete parser and writer registry for every advertised format.
 - Export CSV/TSV with opt-in spreadsheet formula neutralisation, enabled by default.
- Open UTF-8 files or edit text directly; parsing runs in a disposable module worker and the previous valid result remains visible while a replacement is analysed.
+- Open UTF-8 files or edit text directly; parsing runs through the shared
  cancellable disposable-worker protocol with a hard deadline, while the
  previous valid result remains visible until a replacement is ready.
 ### Format semantics
@@ -27,7 +32,7 @@ The safe path subset supports `$`, `.key`, `['key']`, `[index]` and `[*]`. It in
 ### Resource limits
-The current production limits are 16 MiB of UTF-8 input, 8 million JavaScript characters, 100,000 model nodes, depth 128, 50,000 delimited rows, 2,000 columns, 250,000 cells, 1 million characters per field, 4,096 query characters, 1,000 query matches and 16 million generated characters. Disposable parses have a 30-second deadline. UI previews are smaller than the model and state when they are truncated.
+The current production limits are 16 MiB of UTF-8 input, 8 million JavaScript characters, 100,000 model nodes, depth 128, 50,000 delimited rows, 2,000 columns, 250,000 cells, 1 million characters per field/edit value, 5,000 inference samples/fields, 4,096 query or edit-pointer characters, 1,000 query matches and 16 million generated characters. Disposable parses have a 30-second deadline. UI previews are smaller than the model and state when they are truncated.
 See [Architecture](docs/ARCHITECTURE.md), [Privacy and security](docs/PRIVACY-SECURITY.md) and [Accessibility](docs/ACCESSIBILITY.md) for the design and threat model.
@@ -43,7 +48,7 @@ npm run test:browser
 ## Release
-`npm run release:artifact` creates a deterministic `release/data-tools-0.1.0.zip` and checksum sidecar.
+`npm run release:artifact` creates a deterministic `release/data-tools-0.2.0.zip` and checksum sidecar.
 ## Licence
@@ -1,7 +1,7 @@
 # Corresponding source
-The corresponding source for Data Tools 0.1.0 is available at:
+The corresponding source for Data Tools 0.2.0 is available at:
-https://git.add-ideas.de/lotobo/data-tools/src/tag/v0.1.0
+https://git.add-ideas.de/lotobo/data-tools/src/tag/v0.2.0
 Build with Node.js 22, npm 11, `npm ci`, and `npm run release:artifact`.
@@ -2,7 +2,7 @@
 Data Tools is GPL-3.0-or-later. Runtime dependencies retain their own licences:
- add·ideas Toolbox contract and React shell 0.2.3 — Apache-2.0
+- add·ideas Toolbox contract and React shell 0.3.0 — Apache-2.0
 - React and React DOM 19.2.8 — MIT
 - lossless-json 4.3.1 — MIT
 - yaml 2.9.0 — ISC
@@ -6,9 +6,13 @@ Data Tools is a relocatable static React application. There is no application se
 1. The UI checks the local file size before decoding and passes text, the selected format and the optional filename to a fresh module worker.
 2. The worker applies byte/character and structural preflight limits, including a streaming dimension pass before delimited parsing, then parses with format-specific defensive options and converts the result into a serialisable typed node model.
-3. The model is measured again for node count and depth before it is returned. A newer request terminates the older worker, and a 30-second deadline terminates a stalled parse. The UI retains the last successful model until a new one is ready.
+3. The model is measured again for node count and depth before it is returned.
   The shared worker-job protocol filters results by job ID, terminates a
   superseded worker and enforces a 30-second hard deadline. The UI retains the
   last successful model until a new one is ready.
 4. Tree, table, flattened and query projections operate on the model with their own preview/result caps.
 5. Serialisers create a new string and a structured list of notices, coercions and losses. Output is capped before it reaches copy or download actions.
 6. Schema inference samples the same bounded model. Structural edits clone only the addressed path, remeasure the result, then serialize it through the source adapter for review before source replacement.
 The node model has explicit null, boolean, string, number, date, array and ordered-object variants. Number nodes retain a source representation (`exact`, `bigint` or `binary`) and an exact display lexeme. Objects use ordered entry arrays rather than assigning untrusted keys to ordinary JavaScript objects.
@@ -18,6 +22,19 @@ XML deliberately does not pretend to be a JSON object. It is represented as expl
 Runtime versions are pinned exactly: `lossless-json` 4.3.1, `yaml` 2.9.0, `smol-toml` 1.8.0, `@xmldom/xmldom` 0.9.12 and `papaparse` 5.7.0. No imported value is rendered as HTML or executed.
-Version 0.1 keeps its bounded data-model functions as pure app modules rather
+Bounded data-model and parser functions remain pure app modules because exact
-than introducing a runtime helper dependency. They are intentionally shaped
+scalar spelling and XML namespace metadata are domain decisions. Generic
-for later replacement by the shared limits and download APIs.
+byte-size display, safe downloads and cancellable worker lifecycle come from
 `@add-ideas/toolbox-helpers` 0.2.0.
 `src/core/adapters.ts` is the public ordered capability catalogue. `parse.ts`
 and `convert.ts` expose concrete registries that must cover every descriptor;
 tests make missing import/export implementations fail visibly. `schema.ts`
 never turns exact decimal lexemes into binary range constraints. `edit.ts`
 implements immutable RFC 6901 traversal and rejects prototype-affecting keys,
 non-canonical array indices and any result outside the normal model ceilings.
 An edit is not applied immediately: it is first passed through the current
 format's export adapter. The UI shows the proposed source and all conversion
 events, and requires a separate acknowledgement when any event is classified
 as loss.
@@ -15,6 +15,8 @@ Input files are read with the browser File API and decoded as UTF-8. Text is cop
 - XML rejects `DOCTYPE`, entity declarations and XInclude before parsing. The parser is not used to load external resources, and imported markup is never inserted into the DOM.
 - CSV/TSV dynamic typing is disabled. Spreadsheet-safe export prefixes cells beginning with `=`, `+`, `-`, `@`, tab or carriage return; disabling it produces a warning in the conversion report.
 - The safe query language has no evaluator, functions, filters, recursive descent or scripts.
 - Schema inference is capped by sampled nodes/fields and is labelled as inference, not validation.
 - Structural edits use strict JSON Pointer traversal, reject prototype-affecting keys, and cannot bypass the parsed-node/depth ceilings. Lossy source serialization requires a separate acknowledgement.
 Conversion is not sanitisation. XML-to-object conventions, typed-scalar coercions, nested CSV cell encoding, TOML null handling and unsafe numeric conversions are reported alongside the generated result. Users should inspect that report before relying on converted output.
@@ -1,16 +1,17 @@
 {
  "name": "data-tools",
-  "version": "0.1.0",
+  "version": "0.2.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "data-tools",
-      "version": "0.1.0",
+      "version": "0.2.0",
      "license": "GPL-3.0-or-later",
      "dependencies": {
-        "@add-ideas/toolbox-contract": "0.2.3",
+        "@add-ideas/toolbox-contract": "0.3.0",
-        "@add-ideas/toolbox-shell-react": "0.2.3",
+        "@add-ideas/toolbox-helpers": "0.2.0",
        "@add-ideas/toolbox-shell-react": "0.3.0",
        "@xmldom/xmldom": "0.9.12",
        "lossless-json": "4.3.1",
        "papaparse": "5.7.0",
@@ -20,7 +21,7 @@
        "yaml": "2.9.0"
      },
      "devDependencies": {
-        "@add-ideas/toolbox-testkit": "0.2.3",
+        "@add-ideas/toolbox-testkit": "0.3.0",
        "@eslint/js": "10.0.1",
        "@playwright/test": "1.62.1",
        "@testing-library/jest-dom": "6.9.1",
@@ -47,18 +48,25 @@
      }
    },
    "node_modules/@add-ideas/toolbox-contract": {
-      "version": "0.2.3",
+      "version": "0.3.0",
-      "resolved": "https://git.add-ideas.de/api/packages/lotobo/npm/%40add-ideas%2Ftoolbox-contract/-/0.2.3/toolbox-contract-0.2.3.tgz",
+      "resolved": "https://git.add-ideas.de/api/packages/lotobo/npm/%40add-ideas%2Ftoolbox-contract/-/0.3.0/toolbox-contract-0.3.0.tgz",
-      "integrity": "sha512-T0PVSuMT40GjTDfQJhEEY3ZawQq8zz1/ry95JdKI6W39CdLacaRXdGnEpDCMHt+jUbf1Jz7Nat/M5dFCgKVM9A==",
+      "integrity": "sha512-dKrK7BjOFwqJaBfJuhKxZKIld4sH0AKjEn6a0yLnbdMUFY+fFv4VSLGV2tNSBD016gumc2iNqOjUj/ld7x4rtA==",
      "license": "Apache-2.0"
    },
    "node_modules/@add-ideas/toolbox-helpers": {
      "version": "0.2.0",
      "license": "GPL-3.0-or-later",
      "engines": {
        "node": ">=22"
      }
    },
    "node_modules/@add-ideas/toolbox-shell-react": {
-      "version": "0.2.3",
+      "version": "0.3.0",
-      "resolved": "https://git.add-ideas.de/api/packages/lotobo/npm/%40add-ideas%2Ftoolbox-shell-react/-/0.2.3/toolbox-shell-react-0.2.3.tgz",
+      "resolved": "https://git.add-ideas.de/api/packages/lotobo/npm/%40add-ideas%2Ftoolbox-shell-react/-/0.3.0/toolbox-shell-react-0.3.0.tgz",
-      "integrity": "sha512-DT5lQDH48BFkFcmFLZnQh7+Cm73JzBPcmp5WzUXypfkUXpEyDYHzaXgmW4kZ0edSwh4RK4sPmx+JPtK0X4aKCQ==",
+      "integrity": "sha512-74p6JzAOG0YCAKdlc1hLofV4ZIko7vb448S75cIiM88PKm93EHl5VD7g8YVyfM56Ui97UY9dmy+Whiq4sGzpsg==",
      "license": "Apache-2.0",
      "dependencies": {
-        "@add-ideas/toolbox-contract": "0.2.3"
+        "@add-ideas/toolbox-contract": "0.3.0"
      },
      "peerDependencies": {
        "react": ">=18 <20",
@@ -66,13 +74,13 @@
      }
    },
    "node_modules/@add-ideas/toolbox-testkit": {
-      "version": "0.2.3",
+      "version": "0.3.0",
-      "resolved": "https://git.add-ideas.de/api/packages/lotobo/npm/%40add-ideas%2Ftoolbox-testkit/-/0.2.3/toolbox-testkit-0.2.3.tgz",
+      "resolved": "https://git.add-ideas.de/api/packages/lotobo/npm/%40add-ideas%2Ftoolbox-testkit/-/0.3.0/toolbox-testkit-0.3.0.tgz",
-      "integrity": "sha512-sq1MwhKWfFKen+N+124hl74qQimRSvmQ9sOU7jdcI+2qCKZ67+2B8rWyezeV80uTFu4Jv6deHksfYQ/tKNV6XQ==",
+      "integrity": "sha512-4Fk+oSvZFspOMIXr8Xy040nhAaBsIQAzsGyXWSpjn3+k3yBKq7nB1r5zCHhsXzfdLzvPDAx2KcmSNOhM330D9w==",
      "dev": true,
      "license": "Apache-2.0",
      "dependencies": {
-        "@add-ideas/toolbox-contract": "0.2.3"
+        "@add-ideas/toolbox-contract": "0.3.0"
      },
      "bin": {
        "toolbox-check": "dist/cli.js"
@@ -1,7 +1,7 @@
 {
  "name": "data-tools",
-  "version": "0.1.0",
+  "version": "0.2.0",
-  "description": "Inspect, query and convert structured data locally in the browser.",
+  "description": "Inspect, infer, edit, query and loss-aware convert structured data locally.",
  "license": "GPL-3.0-or-later",
  "author": "Albrecht Degering",
  "repository": {
@@ -39,8 +39,9 @@
    "release:artifact": "npm run check && npm run test:browser && npm run package:release -- --force"
  },
  "dependencies": {
-    "@add-ideas/toolbox-contract": "0.2.3",
+    "@add-ideas/toolbox-contract": "0.3.0",
-    "@add-ideas/toolbox-shell-react": "0.2.3",
+    "@add-ideas/toolbox-helpers": "0.2.0",
    "@add-ideas/toolbox-shell-react": "0.3.0",
    "@xmldom/xmldom": "0.9.12",
    "lossless-json": "4.3.1",
    "papaparse": "5.7.0",
@@ -50,7 +51,7 @@
    "yaml": "2.9.0"
  },
  "devDependencies": {
-    "@add-ideas/toolbox-testkit": "0.2.3",
+    "@add-ideas/toolbox-testkit": "0.3.0",
    "@eslint/js": "10.0.1",
    "@playwright/test": "1.62.1",
    "@testing-library/jest-dom": "6.9.1",
@@ -15,7 +15,25 @@ export default defineConfig({
    timeout: 180_000,
  },
  projects: [
-    { name: "chromium", use: { ...devices["Desktop Chrome"] } },
+    {
-    { name: "firefox", use: { ...devices["Desktop Firefox"] } },
+      name: "chromium",
      testIgnore: /responsive\.spec\.ts/,
      use: { ...devices["Desktop Chrome"] },
    },
    {
      name: "firefox",
      testIgnore: /responsive\.spec\.ts/,
      use: { ...devices["Desktop Firefox"] },
    },
    {
      name: "webkit",
      testIgnore: /responsive\.spec\.ts/,
      use: { ...devices["Desktop Safari"] },
    },
    {
      name: "mobile-chromium",
      testMatch: /responsive\.spec\.ts/,
      use: { ...devices["Pixel 5"] },
    },
  ],
 });
@@ -1,5 +1,19 @@
 # Changelog
 ## 0.2.0 - 2026-09-02
 - Adopted `@add-ideas/toolbox-helpers` 0.2.0 for deterministic byte-size
  display, safe downloads and the cancellable worker-job/progress/deadline
  protocol.
 - Kept domain-specific structured-data parsing and diagnostics inside Data
  Tools while removing its duplicate worker lifecycle implementation.
 - Added explicit modular import/export adapter registries for every supported
  structured-data format.
 - Added bounded sample-based JSON Schema inference with field presence,
  nullability and exact numeric-representation evidence.
 - Added immutable RFC 6901 structural edits with a reviewed source-format
  preview and mandatory acknowledgement of known serialization loss.
 ## 0.1.0 - 2026-09-01
 - Added exact-number JSON, YAML 1.2, TOML, hardened XML, CSV, TSV and NDJSON parsing.
@@ -1,5 +1,5 @@
 ==============================================================================
-@add-ideas/toolbox-contract@0.2.3
+@add-ideas/toolbox-contract@0.3.0
 Declared licence: Apache-2.0
 ==============================================================================
 --- LICENSE ---
@@ -198,7 +198,688 @@ Declared licence: Apache-2.0
 ==============================================================================
-@add-ideas/toolbox-shell-react@0.2.3
+@add-ideas/toolbox-helpers@0.2.0
 Declared licence: GPL-3.0-or-later
 ==============================================================================
 --- LICENSE ---
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 ==============================================================================
@add-ideas/toolbox-shell-react@0.3.0
 Declared licence: Apache-2.0
 ==============================================================================
 --- LICENSE ---
@@ -2,15 +2,20 @@
 Inspect, format, query, flatten and convert structured data locally in the browser. Data Tools is a standalone application in the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal); input text and files never leave the current browser.
-## Version 0.1.0
+## Version 0.2.0
 - Detect or explicitly select JSON, YAML 1.2, TOML, XML, CSV, TSV and NDJSON.
 - Keep JSON integer and decimal lexemes exact, including values beyond IEEE-754 range.
 - Inspect a bounded typed tree, a tabular projection and flattened scalar leaves.
 - Query with RFC 6901 JSON Pointer or a deliberately small, non-evaluating path subset.
 - Infer a bounded, sample-labelled JSON Schema with field presence, nullability, mixed types and exact-number provenance.
 - Preview immutable RFC 6901 add/replace/remove edits, inspect the source-format serialization disclosure, and explicitly accept any loss before applying it.
 - Format and convert between every supported output with a visible loss/coercion report.
 - Drive import, export and format selectors from one ordered adapter catalogue with a concrete parser and writer registry for every advertised format.
 - Export CSV/TSV with opt-in spreadsheet formula neutralisation, enabled by default.
- Open UTF-8 files or edit text directly; parsing runs in a disposable module worker and the previous valid result remains visible while a replacement is analysed.
+- Open UTF-8 files or edit text directly; parsing runs through the shared
  cancellable disposable-worker protocol with a hard deadline, while the
  previous valid result remains visible until a replacement is ready.
 ### Format semantics
@@ -27,7 +32,7 @@ The safe path subset supports `$`, `.key`, `['key']`, `[index]` and `[*]`. It in
 ### Resource limits
-The current production limits are 16 MiB of UTF-8 input, 8 million JavaScript characters, 100,000 model nodes, depth 128, 50,000 delimited rows, 2,000 columns, 250,000 cells, 1 million characters per field, 4,096 query characters, 1,000 query matches and 16 million generated characters. Disposable parses have a 30-second deadline. UI previews are smaller than the model and state when they are truncated.
+The current production limits are 16 MiB of UTF-8 input, 8 million JavaScript characters, 100,000 model nodes, depth 128, 50,000 delimited rows, 2,000 columns, 250,000 cells, 1 million characters per field/edit value, 5,000 inference samples/fields, 4,096 query or edit-pointer characters, 1,000 query matches and 16 million generated characters. Disposable parses have a 30-second deadline. UI previews are smaller than the model and state when they are truncated.
 See [Architecture](docs/ARCHITECTURE.md), [Privacy and security](docs/PRIVACY-SECURITY.md) and [Accessibility](docs/ACCESSIBILITY.md) for the design and threat model.
@@ -43,7 +48,7 @@ npm run test:browser
 ## Release
-`npm run release:artifact` creates a deterministic `release/data-tools-0.1.0.zip` and checksum sidecar.
+`npm run release:artifact` creates a deterministic `release/data-tools-0.2.0.zip` and checksum sidecar.
 ## Licence
@@ -1,7 +1,7 @@
 # Corresponding source
-The corresponding source for Data Tools 0.1.0 is available at:
+The corresponding source for Data Tools 0.2.0 is available at:
-https://git.add-ideas.de/lotobo/data-tools/src/tag/v0.1.0
+https://git.add-ideas.de/lotobo/data-tools/src/tag/v0.2.0
 Build with Node.js 22, npm 11, `npm ci`, and `npm run release:artifact`.
@@ -2,7 +2,7 @@
 Data Tools is GPL-3.0-or-later. Runtime dependencies retain their own licences:
- add·ideas Toolbox contract and React shell 0.2.3 — Apache-2.0
+- add·ideas Toolbox contract and React shell 0.3.0 — Apache-2.0
 - React and React DOM 19.2.8 — MIT
 - lossless-json 4.3.1 — MIT
 - yaml 2.9.0 — ISC
@@ -6,9 +6,13 @@ Data Tools is a relocatable static React application. There is no application se
 1. The UI checks the local file size before decoding and passes text, the selected format and the optional filename to a fresh module worker.
 2. The worker applies byte/character and structural preflight limits, including a streaming dimension pass before delimited parsing, then parses with format-specific defensive options and converts the result into a serialisable typed node model.
-3. The model is measured again for node count and depth before it is returned. A newer request terminates the older worker, and a 30-second deadline terminates a stalled parse. The UI retains the last successful model until a new one is ready.
+3. The model is measured again for node count and depth before it is returned.
   The shared worker-job protocol filters results by job ID, terminates a
   superseded worker and enforces a 30-second hard deadline. The UI retains the
   last successful model until a new one is ready.
 4. Tree, table, flattened and query projections operate on the model with their own preview/result caps.
 5. Serialisers create a new string and a structured list of notices, coercions and losses. Output is capped before it reaches copy or download actions.
 6. Schema inference samples the same bounded model. Structural edits clone only the addressed path, remeasure the result, then serialize it through the source adapter for review before source replacement.
 The node model has explicit null, boolean, string, number, date, array and ordered-object variants. Number nodes retain a source representation (`exact`, `bigint` or `binary`) and an exact display lexeme. Objects use ordered entry arrays rather than assigning untrusted keys to ordinary JavaScript objects.
@@ -18,6 +22,19 @@ XML deliberately does not pretend to be a JSON object. It is represented as expl
 Runtime versions are pinned exactly: `lossless-json` 4.3.1, `yaml` 2.9.0, `smol-toml` 1.8.0, `@xmldom/xmldom` 0.9.12 and `papaparse` 5.7.0. No imported value is rendered as HTML or executed.
-Version 0.1 keeps its bounded data-model functions as pure app modules rather
+Bounded data-model and parser functions remain pure app modules because exact
-than introducing a runtime helper dependency. They are intentionally shaped
+scalar spelling and XML namespace metadata are domain decisions. Generic
-for later replacement by the shared limits and download APIs.
+byte-size display, safe downloads and cancellable worker lifecycle come from
 `@add-ideas/toolbox-helpers` 0.2.0.
 `src/core/adapters.ts` is the public ordered capability catalogue. `parse.ts`
 and `convert.ts` expose concrete registries that must cover every descriptor;
 tests make missing import/export implementations fail visibly. `schema.ts`
 never turns exact decimal lexemes into binary range constraints. `edit.ts`
 implements immutable RFC 6901 traversal and rejects prototype-affecting keys,
 non-canonical array indices and any result outside the normal model ceilings.
 An edit is not applied immediately: it is first passed through the current
 format's export adapter. The UI shows the proposed source and all conversion
 events, and requires a separate acknowledgement when any event is classified
 as loss.
@@ -15,6 +15,8 @@ Input files are read with the browser File API and decoded as UTF-8. Text is cop
 - XML rejects `DOCTYPE`, entity declarations and XInclude before parsing. The parser is not used to load external resources, and imported markup is never inserted into the DOM.
 - CSV/TSV dynamic typing is disabled. Spreadsheet-safe export prefixes cells beginning with `=`, `+`, `-`, `@`, tab or carriage return; disabling it produces a warning in the conversion report.
 - The safe query language has no evaluator, functions, filters, recursive descent or scripts.
 - Schema inference is capped by sampled nodes/fields and is labelled as inference, not validation.
 - Structural edits use strict JSON Pointer traversal, reject prototype-affecting keys, and cannot bypass the parsed-node/depth ceilings. Lossy source serialization requires a separate acknowledgement.
 Conversion is not sanitisation. XML-to-object conventions, typed-scalar coercions, nested CSV cell encoding, TOML null handling and unsafe numeric conversions are reported alongside the generated result. Users should inspect that report before relying on converted output.
@@ -1,5 +1,5 @@
 const CACHE_PREFIX = "data-tools-shell-";
-const CACHE_NAME = CACHE_PREFIX + "0.1.0";
+const CACHE_NAME = CACHE_PREFIX + "0.2.0";
 const CORE = ["./", "./manifest.webmanifest", "./favicon.svg"];
 self.addEventListener("install", (event) => {
  event.waitUntil(
@@ -3,12 +3,23 @@
  "schemaVersion": 1,
  "id": "de.add-ideas.data-tools",
  "name": "Data Tools",
-  "version": "0.1.0",
+  "version": "0.2.0",
-  "description": "Inspect, query and convert structured data locally in the browser.",
+  "description": "Inspect, infer, edit, query and loss-aware convert structured data locally.",
  "entry": "./",
  "icon": "./favicon.svg",
  "categories": ["data", "developer", "documents"],
-  "tags": ["json", "yaml", "toml", "xml", "csv", "tsv", "ndjson"],
+  "tags": [
    "json",
    "yaml",
    "toml",
    "xml",
    "csv",
    "tsv",
    "ndjson",
    "schema",
    "convert",
    "edit"
  ],
  "integration": {
    "contextVersion": 1,
    "launchModes": ["navigate", "new-tab"],
@@ -21,9 +32,76 @@
    "crossOriginIsolated": false,
    "topLevelContext": false
  },
  "io": {
    "accepts": [
      {
        "mediaType": "application/json",
        "extensions": [".json"],
        "label": "JSON"
      },
      {
        "mediaType": "application/yaml",
        "extensions": [".yaml", ".yml"],
        "label": "YAML"
      },
      {
        "mediaType": "application/toml",
        "extensions": [".toml"],
        "label": "TOML"
      },
      {
        "mediaType": "application/xml",
        "extensions": [".xml"],
        "label": "XML"
      },
      {
        "mediaType": "text/csv",
        "extensions": [".csv", ".tsv"],
        "label": "CSV and TSV"
      },
      {
        "mediaType": "application/x-ndjson",
        "extensions": [".ndjson", ".jsonl"],
        "label": "NDJSON"
      }
    ],
    "produces": [
      {
        "mediaType": "application/json",
        "extensions": [".json"],
        "label": "JSON and inferred JSON Schema"
      },
      {
        "mediaType": "application/yaml",
        "extensions": [".yaml"],
        "label": "YAML"
      },
      {
        "mediaType": "application/toml",
        "extensions": [".toml"],
        "label": "TOML"
      },
      {
        "mediaType": "application/xml",
        "extensions": [".xml"],
        "label": "XML"
      },
      {
        "mediaType": "text/csv",
        "extensions": [".csv", ".tsv"],
        "label": "CSV and TSV"
      },
      {
        "mediaType": "application/x-ndjson",
        "extensions": [".ndjson"],
        "label": "NDJSON"
      }
    ]
  },
  "capabilities": { "required": ["workers"], "optional": [] },
  "privacy": {
    "processing": "local",
-    "fileUploads": false,
+    "fileUploads": true,
    "telemetry": false,
    "label": "Inputs stay in this browser; nothing is uploaded."
  },
@@ -45,6 +45,12 @@ export function HelpDialog({
        declarations with external semantics are rejected, and spreadsheet-safe
        CSV/TSV output is enabled by default.
      </p>
      <p>
        The schema view performs bounded, sample-based JSON Schema inference and
        records field presence, nullability and exact number representations.
        Structural edits use strict RFC 6901 pointers and show the source-format
        serialization and its loss report before anything is applied.
      </p>
    </dialog>
  );
 }
@@ -1,3 +1,4 @@
 import { formatBytes, triggerBlobDownload } from "@add-ideas/toolbox-helpers";
 import {
  useCallback,
  useEffect,
@@ -10,12 +11,19 @@ import {
  type KeyboardEvent,
 } from "react";
 import { convertDocument } from "../core/convert";
 import { DATA_ADAPTERS } from "../core/adapters";
 import {
  applyNodeEdit,
  parseEditValue,
  type EditOperation,
  type EditValueKind,
 } from "../core/edit";
 import { assertBoundedFile, DATA_LIMITS } from "../core/limits";
 import { scalarText } from "../core/model";
 import { flattenRows, runQuery, tableFromNode, treeRows } from "../core/query";
 import { createParseTask, type ParseTask } from "../core/worker-client";
 import { inferSchema, serializeSchema } from "../core/schema";
 import {
  DATA_FORMATS,
  DataToolsError,
  type ConversionResult,
  type DataFormat,
@@ -38,6 +46,7 @@ const views = [
  { id: "tree", label: "Tree", short: "Paths & types" },
  { id: "table", label: "Table", short: "Rows & columns" },
  { id: "query", label: "Query", short: "Pointer & safe path" },
  { id: "schema", label: "Schema & edit", short: "Infer & change safely" },
  { id: "convert", label: "Convert", short: "Output & disclosure" },
 ] as const;
@@ -50,9 +59,7 @@ function initialView(): ViewId {
 }
 function formatSize(bytes: number): string {
-  if (bytes < 1_024) return `${bytes} B`;
+  return formatBytes(bytes, { fractionDigits: bytes < 1_024 ? 0 : 1 });
  if (bytes < 1_048_576) return `${(bytes / 1_024).toFixed(1)} KiB`;
  return `${(bytes / 1_048_576).toFixed(1)} MiB`;
 }
 function extension(format: DataFormat): string {
@@ -60,20 +67,10 @@ function extension(format: DataFormat): string {
 }
 function downloadText(text: string, format: DataFormat): void {
-  const blob = new Blob([text], { type: "text/plain;charset=utf-8" });
+  triggerBlobDownload(
-  const url = URL.createObjectURL(blob);
+    new Blob([text], { type: "text/plain;charset=utf-8" }),
-  const anchor = document.createElement("a");
+    `converted.${extension(format)}`,
-  anchor.href = url;
+  );
  anchor.download = `converted.${extension(format)}`;
  anchor.rel = "noopener";
  anchor.hidden = true;
  document.body.append(anchor);
  try {
    anchor.click();
  } finally {
    anchor.remove();
    window.setTimeout(() => URL.revokeObjectURL(url), 0);
  }
 }
 function Diagnostics({ diagnostics }: { diagnostics: Diagnostic[] }) {
@@ -228,11 +225,239 @@ function ConversionDisclosure({ result }: { result: ConversionResult }) {
  );
 }
 function SchemaEditor({
  document,
  onApply,
 }: {
  document?: ParsedDocument;
  onApply: (source: string) => void;
 }) {
  const [operation, setOperation] = useState<EditOperation>("replace");
  const [pointer, setPointer] = useState("");
  const [kind, setKind] = useState<EditValueKind>("string");
  const [raw, setRaw] = useState("");
  const [error, setError] = useState("");
  const [accepted, setAccepted] = useState(false);
  const [pending, setPending] = useState<ConversionResult>();
  const inference = useMemo(
    () => (document ? inferSchema(document.root) : undefined),
    [document],
  );
  function previewEdit(): void {
    if (!document) return;
    try {
      const root = applyNodeEdit(document.root, {
        operation,
        pointer,
        value: operation === "remove" ? undefined : parseEditValue(kind, raw),
      });
      const result = convertDocument({ ...document, root }, document.format, {
        spreadsheetSafe: true,
      });
      setPending(result);
      setAccepted(false);
      setError("");
    } catch (reason) {
      setPending(undefined);
      setError(
        reason instanceof Error ? reason.message : "The edit is invalid.",
      );
    }
  }
  const hasLoss =
    pending?.events.some((event) => event.severity === "loss") ?? false;
  return (
    <>
      <div className="section-heading">
        <div>
          <p className="eyebrow">Sample-based, bounded</p>
          <h2>Schema inference</h2>
        </div>
        <button
          type="button"
          disabled={!inference}
          onClick={() =>
            inference &&
            triggerBlobDownload(
              new Blob([serializeSchema(inference)], {
                type: "application/schema+json;charset=utf-8",
              }),
              "inferred.schema.json",
            )
          }
        >
          Download JSON Schema
        </button>
      </div>
      {inference ? (
        <>
          <ul className="schema-notices">
            {inference.notices.map((notice) => (
              <li key={notice}>{notice}</li>
            ))}
          </ul>
          <div
            className="table-scroll"
            tabIndex={0}
            role="region"
            aria-label="Inferred fields"
          >
            <table>
              <caption className="sr-only">Inferred fields</caption>
              <thead>
                <tr>
                  <th>Pointer</th>
                  <th>Types</th>
                  <th>Presence</th>
                  <th>Required</th>
                  <th>Representation</th>
                </tr>
              </thead>
              <tbody>
                {inference.fields.slice(0, 500).map((field) => (
                  <tr key={field.pointer}>
                    <th scope="row">
                      <code>{field.pointer || "(root)"}</code>
                    </th>
                    <td>{field.types.join(" · ")}</td>
                    <td>
                      {field.present} / {field.samples}
                    </td>
                    <td>{field.required ? "yes" : "no"}</td>
                    <td>{field.representations.join(" · ") || "—"}</td>
                  </tr>
                ))}
              </tbody>
            </table>
          </div>
          {inference.fields.length > 500 ? (
            <p className="preview-note">
              The UI shows 500 of {inference.fields.length.toLocaleString()}{" "}
              inferred fields; the download retains the full bounded schema.
            </p>
          ) : null}
        </>
      ) : (
        <p className="empty-state">Analyze valid input to infer a schema.</p>
      )}
      <div className="section-heading schema-edit-heading">
        <div>
          <p className="eyebrow">RFC 6901 addressing</p>
          <h2>Preview a structural edit</h2>
        </div>
      </div>
      <div className="edit-grid">
        <label className="field">
          <span>Operation</span>
          <select
            value={operation}
            onChange={(event) =>
              setOperation(event.target.value as EditOperation)
            }
          >
            <option value="replace">Replace existing</option>
            <option value="add">Add / insert</option>
            <option value="remove">Remove</option>
          </select>
        </label>
        <label className="field">
          <span>JSON Pointer (empty = root)</span>
          <input
            value={pointer}
            onChange={(event) => setPointer(event.target.value)}
            placeholder="/people/0/name"
            spellCheck={false}
          />
        </label>
        {operation !== "remove" ? (
          <>
            <label className="field">
              <span>Value type</span>
              <select
                value={kind}
                onChange={(event) =>
                  setKind(event.target.value as EditValueKind)
                }
              >
                <option value="string">String</option>
                <option value="number">Exact number</option>
                <option value="boolean">Boolean</option>
                <option value="null">Null</option>
                <option value="date">ISO date/time</option>
                <option value="json">JSON value</option>
              </select>
            </label>
            {kind !== "null" ? (
              <label className="field edit-value-field">
                <span>Value</span>
                <textarea
                  value={raw}
                  onChange={(event) => setRaw(event.target.value)}
                  spellCheck={false}
                />
              </label>
            ) : null}
          </>
        ) : null}
      </div>
      <div className="button-row">
        <button
          type="button"
          className="primary-button"
          disabled={!document}
          onClick={previewEdit}
        >
          Preview edit
        </button>
      </div>
      {error ? (
        <p className="field-error" role="alert">
          {error}
        </p>
      ) : null}
      {pending ? (
        <div className="edit-preview">
          <label className="field output-field">
            <span>Serialized source preview</span>
            <textarea readOnly value={pending.text} spellCheck={false} />
          </label>
          <ConversionDisclosure result={pending} />
          {hasLoss ? (
            <label className="toggle">
              <input
                type="checkbox"
                checked={accepted}
                onChange={(event) => setAccepted(event.target.checked)}
              />
              <span>
                <strong>Accept disclosed loss</strong>
                <small>The original source is still untouched.</small>
              </span>
            </label>
          ) : null}
          <button
            type="button"
            className="primary-button"
            disabled={hasLoss && !accepted}
            onClick={() => onApply(pending.text)}
          >
            Apply preview to source
          </button>
        </div>
      ) : null}
    </>
  );
 }
 export function Workbench() {
  const [source, setSource] = useState(DEFAULT_SAMPLE);
  const [selection, setSelection] = useState<FormatSelection>("auto");
  const [filename, setFilename] = useState<string>();
  const [documentModel, setDocumentModel] = useState<ParsedDocument>();
  const [documentRevision, setDocumentRevision] = useState(0);
  const [failureDiagnostics, setFailureDiagnostics] = useState<Diagnostic[]>(
    [],
  );
@@ -262,6 +487,7 @@ export function Workbench() {
        .then((parsed) => {
          if (sequence !== requestSequence.current) return;
          setDocumentModel(parsed);
          setDocumentRevision(sequence);
          setFailureDiagnostics([]);
          setStatus("ready");
          setStatusMessage(
@@ -516,9 +742,9 @@ export function Workbench() {
              data-testid="format-select"
            >
              <option value="auto">Detect automatically</option>
-              {DATA_FORMATS.map((format) => (
+              {DATA_ADAPTERS.map((adapter) => (
-                <option value={format} key={format}>
+                <option value={adapter.format} key={adapter.format}>
-                  {format.toUpperCase()}
+                  {adapter.label}
                </option>
              ))}
            </select>
@@ -757,6 +983,20 @@ export function Workbench() {
            )}
          </>
        ) : null}
        {active === "schema" ? (
          <SchemaEditor
            key={documentRevision}
            document={documentModel}
            onApply={(nextSource) => {
              setSource(nextSource);
              setFilename(undefined);
              setSelection(documentModel?.format ?? "auto");
              setActionNotice(
                "Applied the reviewed edit to the source editor.",
              );
            }}
          />
        ) : null}
        {active === "convert" ? (
          <>
            <div className="section-heading">
@@ -794,9 +1034,9 @@ export function Workbench() {
                    setTarget(event.target.value as DataFormat)
                  }
                >
-                  {DATA_FORMATS.map((format) => (
+                  {DATA_ADAPTERS.map((adapter) => (
-                    <option key={format} value={format}>
+                    <option key={adapter.format} value={adapter.format}>
-                      {format.toUpperCase()}
+                      {adapter.label}
                    </option>
                  ))}
                </select>
@@ -0,0 +1,90 @@
 import type { DataFormat, ParsedDocument } from "./types";
 export interface DataAdapterDescriptor {
  readonly format: DataFormat;
  readonly label: string;
  readonly extensions: readonly string[];
  readonly model: ParsedDocument["model"];
  readonly import: true;
  readonly export: true;
  readonly fidelityNote: string;
 }
 /**
 * Public, ordered adapter catalogue used by parsing, conversion and the UI.
 * Implementations live next to the parser/writer that owns their safety rules;
 * the registries in parse.ts and convert.ts must cover every descriptor.
 */
 export const DATA_ADAPTERS: readonly DataAdapterDescriptor[] = Object.freeze([
  {
    format: "json",
    label: "JSON",
    extensions: ["json"],
    model: "native",
    import: true,
    export: true,
    fidelityNote: "Exact decimal lexemes are retained.",
  },
  {
    format: "yaml",
    label: "YAML 1.2",
    extensions: ["yaml", "yml"],
    model: "native",
    import: true,
    export: true,
    fidelityNote: "Core schema only; tags and merges remain disabled.",
  },
  {
    format: "toml",
    label: "TOML",
    extensions: ["toml"],
    model: "native",
    import: true,
    export: true,
    fidelityNote: "Integers and typed dates are retained explicitly.",
  },
  {
    format: "xml",
    label: "XML",
    extensions: ["xml"],
    model: "xml-explicit",
    import: true,
    export: true,
    fidelityNote:
      "Elements, namespaces, attributes and child order use an explicit model.",
  },
  {
    format: "csv",
    label: "CSV",
    extensions: ["csv"],
    model: "tabular",
    import: true,
    export: true,
    fidelityNote: "Every imported cell remains a string.",
  },
  {
    format: "tsv",
    label: "TSV",
    extensions: ["tsv", "tab"],
    model: "tabular",
    import: true,
    export: true,
    fidelityNote: "Every imported cell remains a string.",
  },
  {
    format: "ndjson",
    label: "NDJSON",
    extensions: ["ndjson", "jsonl"],
    model: "native",
    import: true,
    export: true,
    fidelityNote: "Each non-blank line is one exact JSON value.",
  },
 ]);
 export function adapterDescriptor(format: DataFormat): DataAdapterDescriptor {
  const descriptor = DATA_ADAPTERS.find((item) => item.format === format);
  if (!descriptor)
    throw new TypeError(`No data adapter is registered for ${format}.`);
  return descriptor;
 }
@@ -7,6 +7,7 @@ import Papa from "papaparse";
 import { stringify as stringifyToml, TomlDate } from "smol-toml";
 import { stringify as stringifyYaml } from "yaml";
 import { assertBoundedOutput } from "./limits";
 import { adapterDescriptor, type DataAdapterDescriptor } from "./adapters";
 import { objectValue, scalarText } from "./model";
 import type {
  ConversionOptions,
@@ -452,6 +453,70 @@ function ndjsonText(node: DataNode, events: LossEvent[]): string {
  return `${items.map((item) => jsonText(item, events, 0).replace(/\n/gu, "")).join("\n")}\n`;
 }
 export interface ExportAdapter {
  readonly descriptor: DataAdapterDescriptor;
  readonly serialize: (
    document: ParsedDocument,
    options: ConversionOptions,
    events: LossEvent[],
  ) => string;
 }
 /** Concrete export registry: every adapter owns its disclosure-producing writer. */
 export const EXPORT_ADAPTERS: Readonly<Record<DataFormat, ExportAdapter>> = {
  json: {
    descriptor: adapterDescriptor("json"),
    serialize: (document, _options, events) =>
      `${jsonText(document.root, events, 2)}\n`,
  },
  yaml: {
    descriptor: adapterDescriptor("yaml"),
    serialize: (document, _options, events) =>
      stringifyYaml(interoperableValue(document.root, "yaml", events, ""), {
        version: "1.2",
        schema: "core",
        indent: 2,
        lineWidth: 0,
      }),
  },
  toml: {
    descriptor: adapterDescriptor("toml"),
    serialize: (document, _options, events) => {
      let value = interoperableValue(document.root, "toml", events, "");
      if (document.root.type !== "object") {
        addEvent(events, {
          code: "toml.root-table",
          message:
            "TOML requires a root table; the value is placed in a ‘value’ field.",
          path: "",
          severity: "coercion",
        });
        value = { value };
      }
      return stringifyToml(value as never);
    },
  },
  xml: {
    descriptor: adapterDescriptor("xml"),
    serialize: (document, _options, events) => xmlText(document, events),
  },
  csv: {
    descriptor: adapterDescriptor("csv"),
    serialize: (document, options, events) =>
      delimitedText(document, "csv", options, events),
  },
  tsv: {
    descriptor: adapterDescriptor("tsv"),
    serialize: (document, options, events) =>
      delimitedText(document, "tsv", options, events),
  },
  ndjson: {
    descriptor: adapterDescriptor("ndjson"),
    serialize: (document, _options, events) =>
      ndjsonText(document.root, events),
  },
 };
 export function convertDocument(
  document: ParsedDocument,
  target: DataFormat,
@@ -467,44 +532,6 @@ export function convertDocument(
      severity: "notice",
    });
  }
-  let text: string;
+  const text = EXPORT_ADAPTERS[target].serialize(document, options, events);
  switch (target) {
    case "json":
      text = `${jsonText(document.root, events, 2)}\n`;
      break;
    case "yaml":
      text = stringifyYaml(
        interoperableValue(document.root, "yaml", events, ""),
        { version: "1.2", schema: "core", indent: 2, lineWidth: 0 },
      );
      break;
    case "toml": {
      let value = interoperableValue(document.root, "toml", events, "");
      if (document.root.type !== "object") {
        addEvent(events, {
          code: "toml.root-table",
          message:
            "TOML requires a root table; the value is placed in a ‘value’ field.",
          path: "",
          severity: "coercion",
        });
        value = { value };
      }
      text = stringifyToml(value as never);
      break;
    }
    case "xml":
      text = xmlText(document, events);
      break;
    case "csv":
      text = delimitedText(document, "csv", options, events);
      break;
    case "tsv":
      text = delimitedText(document, "tsv", options, events);
      break;
    case "ndjson":
      text = ndjsonText(document.root, events);
      break;
  }
  return { text: assertBoundedOutput(text), events, target };
 }
@@ -0,0 +1,186 @@
 import { DATA_LIMITS, measureNode } from "./limits";
 import { unescapePointerToken } from "./model";
 import { parseDataDocument } from "./parse";
 import type { DataNode } from "./types";
 export type EditOperation = "add" | "replace" | "remove";
 export type EditValueKind =
  "string" | "number" | "boolean" | "null" | "date" | "json";
 export interface NodeEdit {
  readonly operation: EditOperation;
  readonly pointer: string;
  readonly value?: DataNode;
 }
 const DANGEROUS_KEYS = new Set(["__proto__", "constructor", "prototype"]);
 const JSON_NUMBER = /^-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?$/u;
 export function parseEditValue(kind: EditValueKind, raw: string): DataNode {
  if (raw.length > DATA_LIMITS.maxEditCharacters)
    throw new RangeError(
      `Edit value exceeds ${DATA_LIMITS.maxEditCharacters.toLocaleString()} characters.`,
    );
  if (kind === "string") return { type: "string", value: raw };
  if (kind === "null") return { type: "null" };
  if (kind === "boolean") {
    if (raw !== "true" && raw !== "false")
      throw new SyntaxError(
        "Boolean edit values must be exactly true or false.",
      );
    return { type: "boolean", value: raw === "true" };
  }
  if (kind === "number") {
    if (!JSON_NUMBER.test(raw))
      throw new SyntaxError(
        "Number edit values must use strict JSON number syntax.",
      );
    return { type: "number", raw, representation: "exact" };
  }
  if (kind === "date") {
    const dateKind = /^\d{4}-\d{2}-\d{2}$/u.test(raw)
      ? "local-date"
      : /^\d{2}:\d{2}/u.test(raw)
        ? "local-time"
        : /(?:Z|[+-]\d{2}:\d{2})$/u.test(raw)
          ? "offset-date-time"
          : "local-date-time";
    if (
      !/^\d{4}-\d{2}-\d{2}(?:T\d{2}:\d{2}(?::\d{2}(?:\.\d+)?)?(?:Z|[+-]\d{2}:\d{2})?)?$|^\d{2}:\d{2}(?::\d{2}(?:\.\d+)?)?$/u.test(
        raw,
      )
    )
      throw new SyntaxError(
        "Date/time edit value must use an ISO 8601 lexical form.",
      );
    return { type: "date", value: raw, dateKind };
  }
  return parseDataDocument({ source: raw, format: "json" }).root;
 }
 export function applyNodeEdit(root: DataNode, edit: NodeEdit): DataNode {
  const tokens = pointerTokens(edit.pointer);
  if (edit.operation !== "remove" && !edit.value)
    throw new TypeError(`${edit.operation} requires a value.`);
  if (!tokens.length) {
    if (edit.operation === "remove")
      throw new SyntaxError("The document root cannot be removed.");
    const replacement = edit.value!;
    measureNode(replacement, 0, 0);
    return replacement;
  }
  const next = updateAt(root, tokens, 0, edit);
  measureNode(next, 0, 0);
  return next;
 }
 function updateAt(
  node: DataNode,
  tokens: string[],
  depth: number,
  edit: NodeEdit,
 ): DataNode {
  const token = tokens[depth]!;
  const leaf = depth === tokens.length - 1;
  if (node.type === "object") {
    if (DANGEROUS_KEYS.has(token))
      throw new SyntaxError(`The key “${token}” is prohibited.`);
    const index = node.entries.findIndex((entry) => entry.key === token);
    if (leaf) {
      if (edit.operation === "remove") {
        if (index < 0)
          throw new RangeError(`Pointer member “${token}” does not exist.`);
        return {
          type: "object",
          entries: node.entries.filter((_, item) => item !== index),
        };
      }
      if (edit.operation === "replace" && index < 0)
        throw new RangeError(`Pointer member “${token}” does not exist.`);
      const replacement = { key: token, value: edit.value! };
      return {
        type: "object",
        entries:
          index < 0
            ? [...node.entries, replacement]
            : node.entries.map((entry, item) =>
                item === index ? replacement : entry,
              ),
      };
    }
    if (index < 0)
      throw new RangeError(`Pointer member “${token}” does not exist.`);
    return {
      type: "object",
      entries: node.entries.map((entry, item) =>
        item === index
          ? { ...entry, value: updateAt(entry.value, tokens, depth + 1, edit) }
          : entry,
      ),
    };
  }
  if (node.type === "array") {
    const index = arrayIndex(
      token,
      node.items.length,
      leaf && edit.operation === "add",
    );
    if (leaf) {
      if (edit.operation === "add") {
        const items = node.items.slice();
        items.splice(index, 0, edit.value!);
        return { type: "array", items };
      }
      if (index >= node.items.length)
        throw new RangeError(`Array index ${index} does not exist.`);
      if (edit.operation === "remove")
        return {
          type: "array",
          items: node.items.filter((_, item) => item !== index),
        };
      return {
        type: "array",
        items: node.items.map((item, position) =>
          position === index ? edit.value! : item,
        ),
      };
    }
    if (index >= node.items.length)
      throw new RangeError(`Array index ${index} does not exist.`);
    return {
      type: "array",
      items: node.items.map((item, position) =>
        position === index ? updateAt(item, tokens, depth + 1, edit) : item,
      ),
    };
  }
  throw new TypeError(
    `Pointer traverses through a ${node.type} value at segment ${depth + 1}.`,
  );
 }
 function pointerTokens(pointer: string): string[] {
  if (pointer.length > DATA_LIMITS.maxQueryCharacters)
    throw new RangeError("Edit pointer exceeds the bounded query length.");
  if (pointer === "") return [];
  if (!pointer.startsWith("/"))
    throw new SyntaxError("Edit pointer must be an RFC 6901 JSON Pointer.");
  const tokens = pointer.slice(1).split("/").map(unescapePointerToken);
  if (tokens.length > DATA_LIMITS.maxDepth)
    throw new RangeError("Edit pointer exceeds the structural depth limit.");
  return tokens;
 }
 function arrayIndex(token: string, length: number, allowEnd: boolean): number {
  if (token === "-" && allowEnd) return length;
  if (!/^(?:0|[1-9]\d*)$/u.test(token))
    throw new SyntaxError(`Invalid array index “${token}”.`);
  const index = Number(token);
  if (
    !Number.isSafeInteger(index) ||
    index > length ||
    (!allowEnd && index === length)
  )
    throw new RangeError(`Array index ${token} is outside the bounded array.`);
  return index;
 }
@@ -15,6 +15,9 @@ export const DATA_LIMITS = Object.freeze({
  parseTimeoutMs: 30_000,
  maxPreviewRows: 250,
  maxPreviewColumns: 100,
  maxSchemaSamples: 5_000,
  maxSchemaFields: 5_000,
  maxEditCharacters: 1_000_000,
 });
 export class DataLimitError extends RangeError {
@@ -8,6 +8,7 @@ import Papa from "papaparse";
 import { parse as parseToml } from "smol-toml";
 import { parseDocument as parseYamlDocument } from "yaml";
 import { detectContentFormat, detectFormat } from "./detect";
 import { adapterDescriptor, type DataAdapterDescriptor } from "./adapters";
 import {
  assertBoundedSource,
  DATA_LIMITS,
@@ -553,6 +554,43 @@ function selectedDetection(request: ParseRequest): {
  return { selected, detection, diagnostics };
 }
 export interface ImportAdapter {
  readonly descriptor: DataAdapterDescriptor;
  readonly parse: (source: string, diagnostics: Diagnostic[]) => DataNode;
 }
 /** Concrete import registry: adding a format requires an explicit bounded parser. */
 export const IMPORT_ADAPTERS: Readonly<Record<DataFormat, ImportAdapter>> = {
  json: {
    descriptor: adapterDescriptor("json"),
    parse: (source) => parseJson(source),
  },
  yaml: {
    descriptor: adapterDescriptor("yaml"),
    parse: parseYaml,
  },
  toml: {
    descriptor: adapterDescriptor("toml"),
    parse: parseTomlDocument,
  },
  xml: {
    descriptor: adapterDescriptor("xml"),
    parse: parseXml,
  },
  csv: {
    descriptor: adapterDescriptor("csv"),
    parse: (source, diagnostics) => parseDelimited(source, ",", diagnostics),
  },
  tsv: {
    descriptor: adapterDescriptor("tsv"),
    parse: (source, diagnostics) => parseDelimited(source, "\t", diagnostics),
  },
  ndjson: {
    descriptor: adapterDescriptor("ndjson"),
    parse: parseNdjson,
  },
 };
 export function parseDataDocument(request: ParseRequest): ParsedDocument {
  let bytes: number;
  try {
@@ -563,31 +601,9 @@ export function parseDataDocument(request: ParseRequest): ParsedDocument {
    throw parserFailure(message, "limit.input", request.source);
  }
  const { selected, detection, diagnostics } = selectedDetection(request);
  let root: DataNode;
  try {
-    switch (selected) {
+    const adapter = IMPORT_ADAPTERS[selected];
-      case "json":
+    const root = adapter.parse(request.source, diagnostics);
        root = parseJson(request.source);
        break;
      case "yaml":
        root = parseYaml(request.source, diagnostics);
        break;
      case "toml":
        root = parseTomlDocument(request.source, diagnostics);
        break;
      case "xml":
        root = parseXml(request.source, diagnostics);
        break;
      case "csv":
        root = parseDelimited(request.source, ",", diagnostics);
        break;
      case "tsv":
        root = parseDelimited(request.source, "\t", diagnostics);
        break;
      case "ndjson":
        root = parseNdjson(request.source, diagnostics);
        break;
    }
    const stats = measureNode(root, bytes, request.source.length);
    return {
      format: selected,
@@ -595,12 +611,7 @@ export function parseDataDocument(request: ParseRequest): ParsedDocument {
      root,
      diagnostics,
      stats,
-      model:
+      model: adapter.descriptor.model,
        selected === "xml"
          ? "xml-explicit"
          : selected === "csv" || selected === "tsv"
            ? "tabular"
            : "native",
    };
  } catch (error) {
    if (error instanceof DataToolsError) throw error;
@@ -0,0 +1,204 @@
 import { assertBoundedOutput, DATA_LIMITS } from "./limits";
 import { escapePointerToken } from "./model";
 import type { DataNode } from "./types";
 export interface InferredField {
  readonly pointer: string;
  readonly types: readonly string[];
  readonly present: number;
  readonly samples: number;
  readonly required: boolean;
  readonly nullable: boolean;
  readonly representations: readonly string[];
 }
 export interface SchemaInference {
  readonly schemaVersion: 1;
  readonly sampledNodes: number;
  readonly truncated: boolean;
  readonly fields: readonly InferredField[];
  readonly notices: readonly string[];
  readonly jsonSchema: Record<string, unknown>;
 }
 interface InferenceState {
  sampledNodes: number;
  truncated: boolean;
  fields: InferredField[];
 }
 export function inferSchema(root: DataNode): SchemaInference {
  const state: InferenceState = {
    sampledNodes: 0,
    truncated: false,
    fields: [],
  };
  const schema = inferMany([root], "", state, 0);
  return {
    schemaVersion: 1,
    sampledNodes: state.sampledNodes,
    truncated: state.truncated,
    fields: state.fields,
    notices: [
      "This is sample-based inference, not proof that future documents conform.",
      "Exact number lexemes are not converted into binary minimum/maximum constraints.",
      ...(state.truncated
        ? [
            `Inference stopped at the ${DATA_LIMITS.maxSchemaSamples.toLocaleString()}-node sample budget.`,
          ]
        : []),
    ],
    jsonSchema: {
      $schema: "https://json-schema.org/draft/2020-12/schema",
      $comment:
        "Generated locally from bounded samples. x-add-ideas-* members preserve inference provenance.",
      ...schema,
      "x-add-ideas-sampled-nodes": state.sampledNodes,
      "x-add-ideas-truncated": state.truncated,
    },
  };
 }
 export function serializeSchema(inference: SchemaInference): string {
  return assertBoundedOutput(
    `${JSON.stringify(inference.jsonSchema, null, 2)}\n`,
  );
 }
 function inferMany(
  candidates: readonly DataNode[],
  pointer: string,
  state: InferenceState,
  depth: number,
 ): Record<string, unknown> {
  if (depth > DATA_LIMITS.maxDepth) return {};
  const nodes = candidates.slice(0, remainingSamples(state));
  if (nodes.length < candidates.length) state.truncated = true;
  state.sampledNodes += nodes.length;
  if (!nodes.length) return {};
  const groups = new Map<string, DataNode[]>();
  for (const node of nodes) {
    const type = schemaType(node);
    const group = groups.get(type) ?? [];
    group.push(node);
    groups.set(type, group);
  }
  const schemas = [...groups.entries()].map(([type, grouped]) =>
    inferType(type, grouped, pointer, state, depth),
  );
  return schemas.length === 1 ? schemas[0]! : { anyOf: schemas };
 }
 function inferType(
  type: string,
  nodes: readonly DataNode[],
  pointer: string,
  state: InferenceState,
  depth: number,
 ): Record<string, unknown> {
  if (type === "null" || type === "boolean" || type === "string")
    return { type };
  if (type === "integer" || type === "number") {
    const representations = [
      ...new Set(
        nodes.flatMap((node) =>
          node.type === "number" ? [node.representation] : [],
        ),
      ),
    ].sort();
    return {
      type,
      "x-add-ideas-number-representations": representations,
      "x-add-ideas-number-examples": nodes
        .flatMap((node) => (node.type === "number" ? [node.raw] : []))
        .slice(0, 3),
    };
  }
  if (type.startsWith("date:")) {
    const kind = type.slice(5);
    const format =
      kind === "local-date"
        ? "date"
        : kind === "local-time"
          ? "time"
          : "date-time";
    return { type: "string", format, "x-add-ideas-date-kind": kind };
  }
  if (type === "array") {
    const arrays = nodes.filter(
      (node): node is Extract<DataNode, { type: "array" }> =>
        node.type === "array",
    );
    const items = arrays.flatMap((node) => node.items);
    return {
      type: "array",
      items: items.length
        ? inferMany(items, `${pointer}/*`, state, depth + 1)
        : {},
      "x-add-ideas-array-samples": arrays.length,
      "x-add-ideas-empty-array-observed": arrays.some(
        (node) => node.items.length === 0,
      ),
    };
  }
  const objects = nodes.filter(
    (node): node is Extract<DataNode, { type: "object" }> =>
      node.type === "object",
  );
  const keys: string[] = [];
  for (const object of objects)
    for (const entry of object.entries)
      if (!keys.includes(entry.key)) keys.push(entry.key);
  const properties: Record<string, unknown> = Object.create(null) as Record<
    string,
    unknown
  >;
  const required: string[] = [];
  for (const key of keys) {
    if (state.fields.length >= DATA_LIMITS.maxSchemaFields) {
      state.truncated = true;
      break;
    }
    const values = objects.flatMap((object) => {
      const entry = object.entries.find((candidate) => candidate.key === key);
      return entry ? [entry.value] : [];
    });
    const childPointer = `${pointer}/${escapePointerToken(key)}`;
    state.fields.push({
      pointer: childPointer,
      types: [...new Set(values.map(schemaType))].sort(),
      present: values.length,
      samples: objects.length,
      required: values.length === objects.length,
      nullable: values.some((value) => value.type === "null"),
      representations: [
        ...new Set(
          values.flatMap((value) =>
            value.type === "number" ? [value.representation] : [],
          ),
        ),
      ].sort(),
    });
    properties[key] = inferMany(values, childPointer, state, depth + 1);
    if (values.length === objects.length) required.push(key);
  }
  return {
    type: "object",
    properties,
    ...(required.length ? { required } : {}),
    additionalProperties: true,
    "x-add-ideas-object-samples": objects.length,
  };
 }
 function schemaType(node: DataNode): string {
  if (node.type === "number")
    return /^-?(?:0|[1-9]\d*)$/u.test(node.raw) ? "integer" : "number";
  if (node.type === "date") return `date:${node.dateKind}`;
  return node.type;
 }
 function remainingSamples(state: InferenceState): number {
  return Math.max(0, DATA_LIMITS.maxSchemaSamples - state.sampledNodes);
 }
@@ -1,3 +1,7 @@
 import {
  startWorkerJob,
  WorkerJobTimeoutError,
 } from "@add-ideas/toolbox-helpers";
 import { parseDataDocument } from "./parse";
 import { DATA_LIMITS } from "./limits";
 import {
@@ -6,15 +10,7 @@ import {
  type ParseRequest,
 } from "./types";
-interface WorkerResponseOk {
+interface SerializedParseError {
  id: number;
  ok: true;
  document: ParsedDocument;
 }
 interface WorkerResponseError {
  id: number;
  ok: false;
  message: string;
  diagnostics: DataToolsError["diagnostics"];
 }
@@ -24,10 +20,7 @@ export interface ParseTask {
  cancel(): void;
 }
 let requestId = 0;
 export function createParseTask(request: ParseRequest): ParseTask {
  const id = ++requestId;
  if (typeof Worker === "undefined") {
    let cancelled = false;
    return {
@@ -45,14 +38,20 @@ export function createParseTask(request: ParseRequest): ParseTask {
    new URL("../workers/data.worker.ts", import.meta.url),
    { type: "module", name: "data-tools-parser" },
  );
-  let settled = false;
+  const task = startWorkerJob<
-  let rejectPromise: ((reason?: unknown) => void) | undefined;
+    ParseRequest,
-  const timeout = globalThis.setTimeout(() => {
+    ParsedDocument,
-    if (settled) return;
+    never,
-    settled = true;
+    SerializedParseError
-    worker.terminate();
+  >(worker, request, {
-    rejectPromise?.(
+    timeoutMs: DATA_LIMITS.parseTimeoutMs,
-      new DataToolsError(
+    deserializeError: (error) =>
      new DataToolsError(error.message, error.diagnostics),
    workerFailureMessage: "The parser worker failed.",
  });
  const promise = task.promise.catch((error: unknown) => {
    if (error instanceof WorkerJobTimeoutError) {
      throw new DataToolsError(
        `Parsing exceeded the ${DATA_LIMITS.parseTimeoutMs / 1000}-second safety limit.`,
        [
          {
@@ -62,45 +61,31 @@ export function createParseTask(request: ParseRequest): ParseTask {
            severity: "error",
          },
        ],
      ),
      );
-  }, DATA_LIMITS.parseTimeoutMs);
+    }
-  const finish = () => {
+    if (
-    if (settled) return false;
+      error instanceof DataToolsError ||
-    settled = true;
+      (error instanceof DOMException && error.name === "AbortError")
-    globalThis.clearTimeout(timeout);
+    )
-    worker.terminate();
+      throw error;
-    return true;
+    throw new DataToolsError(
-  };
+      error instanceof Error ? error.message : "The parser worker failed.",
-  const promise = new Promise<ParsedDocument>((resolve, reject) => {
+      [
    rejectPromise = reject;
    worker.onmessage = (
      event: MessageEvent<WorkerResponseOk | WorkerResponseError>,
    ) => {
      if (event.data.id !== id || !finish()) return;
      if (event.data.ok) resolve(event.data.document);
      else
        reject(new DataToolsError(event.data.message, event.data.diagnostics));
    };
    worker.onerror = (event) => {
      if (!finish()) return;
      reject(
        new DataToolsError(event.message || "The parser worker failed.", [
        {
          code: "worker.failure",
-            message: event.message || "The parser worker failed.",
+          message:
            error instanceof Error
              ? error.message
              : "The parser worker failed.",
          severity: "error",
        },
-        ]),
+      ],
    );
    };
    worker.postMessage({ id, request });
  });
  return {
    promise,
    cancel() {
-      if (!finish()) return;
+      task.cancel("Parsing cancelled.");
      rejectPromise?.(new DOMException("Parsing cancelled.", "AbortError"));
    },
  };
 }
@@ -753,6 +753,54 @@ body {
  gap: 0.45rem;
 }
 .schema-notices {
  margin: 0 0 0.85rem;
  padding-left: 1.15rem;
  color: var(--toolbox-muted);
  font-size: 0.78rem;
  line-height: 1.5;
 }
 .schema-edit-heading {
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--toolbox-border);
 }
 .edit-grid {
  display: grid;
  grid-template-columns: minmax(8rem, 0.65fr) minmax(14rem, 1.4fr) minmax(
      8rem,
      0.65fr
    );
  gap: 0.7rem;
  align-items: end;
  margin-bottom: 0.75rem;
 }
 .edit-value-field {
  grid-column: 1 / -1;
 }
 .edit-value-field textarea {
  min-height: 6rem;
  font-family: var(--toolbox-font-mono);
 }
 .edit-preview {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.9rem;
  padding: 0.85rem;
  border: 1px solid var(--toolbox-border);
  border-radius: 0.7rem;
  background: var(--toolbox-surface-soft);
 }
 .edit-preview > button {
  justify-self: start;
 }
 .disclosure {
  margin-top: 0.75rem;
  padding: 0.75rem;
@@ -864,9 +912,14 @@ body {
  }
  .editor-toolbar,
  .query-controls,
-  .conversion-controls {
+  .conversion-controls,
  .edit-grid {
    grid-template-columns: 1fr;
  }
  .edit-value-field {
    grid-column: auto;
  }
  .editor-toolbar > :not(.format-field) {
    width: 100%;
  }
@@ -3,12 +3,23 @@
  "schemaVersion": 1,
  "id": "de.add-ideas.data-tools",
  "name": "Data Tools",
-  "version": "0.1.0",
+  "version": "0.2.0",
-  "description": "Inspect, query and convert structured data locally in the browser.",
+  "description": "Inspect, infer, edit, query and loss-aware convert structured data locally.",
  "entry": "./",
  "icon": "./favicon.svg",
  "categories": ["data", "developer", "documents"],
-  "tags": ["json", "yaml", "toml", "xml", "csv", "tsv", "ndjson"],
+  "tags": [
    "json",
    "yaml",
    "toml",
    "xml",
    "csv",
    "tsv",
    "ndjson",
    "schema",
    "convert",
    "edit"
  ],
  "integration": {
    "contextVersion": 1,
    "launchModes": ["navigate", "new-tab"],
@@ -21,9 +32,79 @@
    "crossOriginIsolated": false,
    "topLevelContext": false
  },
  "io": {
    "accepts": [
      {
        "mediaType": "application/json",
        "extensions": [".json"],
        "label": "JSON"
      },
      {
        "mediaType": "application/yaml",
        "extensions": [".yaml", ".yml"],
        "label": "YAML"
      },
      {
        "mediaType": "application/toml",
        "extensions": [".toml"],
        "label": "TOML"
      },
      {
        "mediaType": "application/xml",
        "extensions": [".xml"],
        "label": "XML"
      },
      {
        "mediaType": "text/csv",
        "extensions": [".csv", ".tsv"],
        "label": "CSV and TSV"
      },
      {
        "mediaType": "application/x-ndjson",
        "extensions": [".ndjson", ".jsonl"],
        "label": "NDJSON"
      }
    ],
    "produces": [
      {
        "mediaType": "application/json",
        "extensions": [".json"],
        "label": "JSON and inferred JSON Schema"
      },
      {
        "mediaType": "application/yaml",
        "extensions": [".yaml"],
        "label": "YAML"
      },
      {
        "mediaType": "application/toml",
        "extensions": [".toml"],
        "label": "TOML"
      },
      {
        "mediaType": "application/xml",
        "extensions": [".xml"],
        "label": "XML"
      },
      {
        "mediaType": "text/csv",
        "extensions": [".csv", ".tsv"],
        "label": "CSV and TSV"
      },
      {
        "mediaType": "application/x-ndjson",
        "extensions": [".ndjson"],
        "label": "NDJSON"
      }
    ]
  },
  "capabilities": {
    "required": ["workers"],
    "optional": []
  },
  "privacy": {
    "processing": "local",
-    "fileUploads": false,
+    "fileUploads": true,
    "telemetry": false,
    "label": "Inputs stay in this browser; nothing is uploaded."
  },
@@ -1 +1 @@
-export const APP_VERSION = "0.1.0";
+export const APP_VERSION = "0.2.0";
@@ -1,4 +1,5 @@
 /// <reference lib="webworker" />
 import { createWorkerJobMessageHandler } from "@add-ideas/toolbox-helpers";
 import { parseDataDocument } from "../core/parse";
 import {
  DataToolsError,
@@ -6,29 +7,16 @@ import {
  type ParseRequest,
 } from "../core/types";
-interface WorkerRequest {
+self.onmessage = createWorkerJobMessageHandler<
-  id: number;
+  ParseRequest,
-  request: ParseRequest;
+  ParsedDocument,
-}
+  never,
-
+  { message: string; diagnostics: DataToolsError["diagnostics"] }
-type WorkerResponse =
+>(
-  | { id: number; ok: true; document: ParsedDocument }
+  (request) => parseDataDocument(request),
-  | {
+  (response) => self.postMessage(response),
-      id: number;
+  {
-      ok: false;
+    serializeError: (error) => ({
      message: string;
      diagnostics: DataToolsError["diagnostics"];
    };
 self.onmessage = (event: MessageEvent<WorkerRequest>) => {
  const { id, request } = event.data;
  let response: WorkerResponse;
  try {
    response = { id, ok: true, document: parseDataDocument(request) };
  } catch (error) {
    response = {
      id,
      ok: false,
      message:
        error instanceof Error
          ? error.message
@@ -46,9 +34,8 @@ self.onmessage = (event: MessageEvent<WorkerRequest>) => {
                severity: "error",
              },
            ],
-    };
+    }),
-  }
+  },
-  self.postMessage(response);
+);
 };
 export {};
@@ -109,6 +109,32 @@ test("shows a hardened XML error while retaining the last successful model", asy
  ).toBeVisible();
 });
 test("infers a schema and applies a reviewed exact-number edit", async ({
  page,
 }) => {
  await page.goto("/deep/nested/data/");
  await expect(page.getByText(/Parsed as JSON/iu)).toBeVisible();
  await page.getByRole("tab", { name: /Schema & edit/iu }).click();
  await expect(
    page.getByRole("heading", { name: "Schema inference" }),
  ).toBeVisible();
  await expect(page.getByRole("rowheader", { name: "/project" })).toBeVisible();
  await page.getByLabel(/JSON Pointer/iu).fill("/exactInteger");
  await page.getByLabel("Value type").selectOption("number");
  await page
    .locator(".edit-value-field textarea")
    .fill("9007199254740993123456790");
  await page.getByRole("button", { name: "Preview edit" }).click();
  await expect(
    page.getByText("No known loss or coercion in this conversion."),
  ).toBeVisible();
  await page.getByRole("button", { name: "Apply preview to source" }).click();
  await expect(page.getByTestId("source-editor")).toHaveValue(
    /9007199254740993123456790/u,
  );
  await expect(page.getByText(/Parsed as JSON/iu)).toBeVisible();
 });
 test("serves the release identity and hardened headers", async ({
  request,
 }) => {
@@ -124,7 +150,7 @@ test("serves the release identity and hardened headers", async ({
  const manifest = await request.get("/deep/nested/data/toolbox-app.json");
  await expect(manifest.json()).resolves.toMatchObject({
    id: "de.add-ideas.data-tools",
-    version: "0.1.0",
+    version: "0.2.0",
    entry: "./",
  });
 });
@@ -0,0 +1,18 @@
 import { expect, test } from "@playwright/test";
 test("keeps the primary workspace inside a narrow viewport", async ({
  page,
 }) => {
  await page.goto("/deep/nested/data/");
  await expect(page.locator("main").first()).toBeVisible();
  await expect(
    page.locator("main .loading, main .workbench-loading"),
  ).toHaveCount(0);
  const widths = await page.evaluate(() => ({
    content: document.documentElement.scrollWidth,
    viewport: document.documentElement.clientWidth,
  }));
  expect(widths.viewport).toBeLessThanOrEqual(430);
  expect(widths.content).toBeLessThanOrEqual(widths.viewport + 1);
 });
@@ -9,7 +9,7 @@ async function renderReady() {
    vi.fn(async () => new Response("Not found", { status: 404 })),
  );
  render(<App />);
-  await screen.findByText(/Parsed as JSON/iu, {}, { timeout: 2_000 });
+  await screen.findByText(/Parsed as JSON/iu, {}, { timeout: 4_000 });
 }
 describe("Data Tools workbench", () => {
@@ -31,7 +31,7 @@ describe("Data Tools workbench", () => {
    await screen.findByText(
      /Unexpected|invalid|property/iu,
      {},
-      { timeout: 2_000 },
+      { timeout: 4_000 },
    );
    await user.click(screen.getByRole("tab", { name: /Tree/iu }));
    expect(screen.getByText("project")).toBeVisible();
@@ -0,0 +1,115 @@
 import { describe, expect, it } from "vitest";
 import { DATA_ADAPTERS } from "../../src/core/adapters";
 import { EXPORT_ADAPTERS, convertDocument } from "../../src/core/convert";
 import { applyNodeEdit, parseEditValue } from "../../src/core/edit";
 import { normalizeValue } from "../../src/core/model";
 import { IMPORT_ADAPTERS, parseDataDocument } from "../../src/core/parse";
 import { inferSchema, serializeSchema } from "../../src/core/schema";
 import { DATA_FORMATS } from "../../src/core/types";
 describe("modular adapters", () => {
  it("has an explicit import and export implementation for every descriptor", () => {
    expect(DATA_ADAPTERS.map((adapter) => adapter.format)).toEqual(
      DATA_FORMATS,
    );
    expect(Object.keys(IMPORT_ADAPTERS)).toEqual([...DATA_FORMATS]);
    expect(Object.keys(EXPORT_ADAPTERS)).toEqual([...DATA_FORMATS]);
  });
 });
 describe("loss-aware schema inference", () => {
  it("merges record samples, presence and exact numeric representation", () => {
    const document = parseDataDocument({
      source:
        '{"people":[{"id":9007199254740993123456789,"name":"Ada"},{"id":2,"nickname":null}]}',
      format: "json",
    });
    const inference = inferSchema(document.root);
    expect(inference.fields).toEqual(
      expect.arrayContaining([
        expect.objectContaining({
          pointer: "/people/*/id",
          required: true,
          types: ["integer"],
        }),
        expect.objectContaining({ pointer: "/people/*/name", required: false }),
        expect.objectContaining({
          pointer: "/people/*/nickname",
          nullable: true,
        }),
      ]),
    );
    const schema = JSON.parse(serializeSchema(inference)) as Record<
      string,
      unknown
    >;
    expect(schema.$schema).toBe("https://json-schema.org/draft/2020-12/schema");
    expect(JSON.stringify(schema)).toContain("9007199254740993123456789");
  });
  it("enforces the field budget across nested objects", () => {
    const branch = (prefix: string) =>
      Object.fromEntries(
        Array.from({ length: 3_000 }, (_, index) => [
          `${prefix}${index}`,
          index,
        ]),
      );
    const inference = inferSchema(
      normalizeValue({ left: branch("a"), right: branch("b") }),
    );
    expect(inference.fields).toHaveLength(5_000);
    expect(inference.truncated).toBe(true);
  });
 });
 describe("reviewable structural editing", () => {
  const document = parseDataDocument({
    source: '{"items":[1,2],"name":"before"}',
    format: "json",
  });
  it("uses strict scalar syntax and immutable RFC 6901 operations", () => {
    const replaced = applyNodeEdit(document.root, {
      operation: "replace",
      pointer: "/name",
      value: parseEditValue("string", "after"),
    });
    const inserted = applyNodeEdit(replaced, {
      operation: "add",
      pointer: "/items/1",
      value: parseEditValue("number", "9007199254740993123456789"),
    });
    expect(
      convertDocument({ ...document, root: inserted }, "json").text,
    ).toContain("9007199254740993123456789");
    expect(convertDocument(document, "json").text).toContain(
      '"name": "before"',
    );
    expect(() => parseEditValue("number", "01")).toThrow(/strict JSON/iu);
    expect(() =>
      applyNodeEdit(document.root, {
        operation: "add",
        pointer: "/__proto__",
        value: parseEditValue("null", ""),
      }),
    ).toThrow(/prohibited/iu);
  });
  it("exposes serialization loss before an edit is applied", () => {
    const toml = parseDataDocument({
      source: "answer = 42\n",
      format: "toml",
    });
    const edited = applyNodeEdit(toml.root, {
      operation: "add",
      pointer: "/missing",
      value: parseEditValue("null", ""),
    });
    expect(convertDocument({ ...toml, root: edited }, "toml").events).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ code: "toml.null", severity: "loss" }),
      ]),
    );
  });
 });
`@@ -1 +1 @@`
	`export const APP_VERSION = "0.1.0";`	`export const APP_VERSION = "0.2.0";`